Matlab - select all rows starting with a particular number

问题

Say I have a matrix A, and I want to construct a matrix B that contains all rows of B that start with a particular number. How? Thanks

回答1:

Select all rows of B into A, where the first colum of B has value n:

A = B(B(:,1) == n,:); 

In contrast to that, the following selects all rows of B into A, starting from row index n:

A = B(n:end,:); 

来源：https://stackoverflow.com/questions/5561007/matlab-select-all-rows-starting-with-a-particular-number